<header class="header-tmall">
  <section class="w1230">
    <div class="header_logo">
      <img src="https://img.alicdn.com/tfs/TB1MaLKRXXXXXaWXFXXXXXXXXXX-480-260.png" alt="">
    </div>

    <div class="header_search">
      <input type="text" class="search_val" placeholder="搜索 天猫 商品/品牌/店铺">
      <button class="search_btn">搜索</button>
    </div>
  </section>
  
</header>